63results about How to "Prevent spread of pollution" patented technology

The invention discloses a pre-embedded bag for multi-stage remediation of uranium-contaminated soil and a use method thereof, and belongs to the technical field of uranium-contaminated soil remediation. The pre-embedded bag for multi-stage remediation of uranium-contaminated soil can be pre-embedded by a soil cleaning and per-embedding manner, on the one hand, uranyl ions in the soil are transferred through a strict water-conducting network, a large amount of uranyl ions are actively and quickly collected into the pre-embedded bag to facilitate fixed-point remediation, on the other hand, a special soil remediation agent is used to greatly improve adsorption and accumulation for uranyl ions, agglomeration of uranyl ions is improved based on nano porous properties, and uranyl ions are filledin micro-pores to avoid contamination and diffusion. After the active primary remediation, uranyl ions in the uranium-contaminated soil are reduced to a certain value, then natural secondary remediation, namely heavy metal uranium enrichment plant remediation, is followed, the soil organic matter content and soil fertility are increased, a soil surface structure is improved and maintained, and asolid foundation for direct use of the soil after uranium pollution remediation is laid.

The invention discloses a preparation method of cure-peelable high-viscosity radioactive aerosol inhibitor, comprising: using polyethylene alcohol as matrix, acrylamide as a modifying functional monomer and water as a solvent, preparing a polymer solution by using free radical polymerizing mechanism, and adding gelatin and a surfactant to modify the solution. The radioactive aerosol inhibitor of the invention is made by subjecting the matrix polyethylene alcohol and the monomer acrylamide to free radical solution polymerization grafting and copolymerization, the prepared inhibitor has cross-linked mesh structure and high viscosity, the inhibitor is sprayed and atomized to capture dust particles and then settles on the surface of an object, aerosol dust particles are wrapped in along with volatilization of a solvent and can cure into a peelable continuous film, and the film can be removed and recycled by mechanical means. The radioactive aerosol inhibitor is applicable to inhibiting and removing radioactive aerosols possibly produced in nuclear facility decommissioning or nuclear accidents, thereby preventing radioactive contamination spread and protecting safety of operators and environment.

The invention relates to the field of virus detection, in particular to a RPA-LED visualized reagent kit for detecting porcine epidemic diarrhea viruses. The invention provides a recombinase and polymerase isothermal amplification primer set for detecting the porcine epidemic diarrhea viruses. The reagent kit comprises an upstream primer, a downstream primer and a probe, of which the sequences areshown as SEQ ID NO: 1-3. The invention further provides a reverse transcription recombinase polymerase isothermal amplification reagent for detecting the porcine epidemic diarrhea viruses. The reverse transcription recombinase polymerase isothermal amplification reagent comprises recombinase polymerase, dNTPs and the primer set. In addition, the invention provides a reverse transcription recombinase polymerase isothermal amplification reagent kit for detecting the porcine epidemic diarrhea viruses, and the reagent kit comprises the primer set or reagent. The detection reagent kit is high in specificity and high in sensitivity, results are easy to observe, complex equipment is not needed, and portable on-the-site quick nucleic acid detection of the porcine epidemic diarrhea viruses can bereally realized.

The computer case glass processing device with the protection function comprises a working platform, positioning frames, a processing plate and an anti-static processing plate; the positioning frames are fixed to the four corners of the top of the working platform, a cross rod is welded to the top of a telescopic column, a sliding groove is formed in the cross rod, a machining plate is slidably connected into the sliding groove, a cleaning box is fixed to the top of the machining plate, an anti-static machining plate is fixed to the bottom of the machining plate, a stretching frame is fixed to the back face of the working platform, a set of parallel clamps are installed at the top of the working platform, and the clamps are located on one side of the positioning frame. A series of elements are arranged, the device can be assisted in achieving longitudinal and transverse double-axis positioning in the machining process, synchronous cutting and grinding operation can be conducted on raw glass sheets, the machining efficiency of the device is improved, and the raw glass sheets can be subjected to antistatic film attaching machining, so that the invention has the antistatic function, and the use safety of the computer case is guaranteed.

The invention relates to a composite semi-conductor integrated circuit with a three-dimensional element. In the composite semi-conductor integrated circuit, a welding pad or an inductor is arranged above an electronic element in a three-dimensional mode. The thickness of a dielectric layer inserted between the welding pad or the inductor and the electronic element ranges from 10 microns to 30 microns, so that influence on the performance of the element caused by the structure is effectively reduced. A protective layer can be coated on the electronic element to prevent pollution from metal materials making the welding pad or the inductor, and therefore, relatively cheap copper can be used for making the welding pad and the inductor. The three-dimensional welding pad can be applied to a wire bonding technology or a lug bonding technology.

The invention provides a vegetation recovery method for extremely acidified mine soil, and belongs to the technical field of vegetation recovery. The method follows a primary succession rule; plant configuration is performed in a layered and staged manner; in the first stage, primary succession started in a primary bare area is simulated, acid-resistant and heavy-metal-resistant plants are taken as main plants, and multiple plants such as trees, shrubs and grasses are subjected to group configuration; and in the second stage, tolerant plants are transited to natural succession through the compensation effect of biodiversity, and a near-natural plant community independent of the tolerant plants is constructed. According to the method, a stable three-dimensional vegetation ecological systemcan be established on the extremely acidified mine soil in a short time, soil acidification and re-acidification are effectively controlled, and the long-term stability of the vegetation system is achieved. The method is easy to operate, rapid in vegetation reconstruction, high in coverage degree, not prone to degradation, good in acidification control effect and suitable for large-area application and popularization.

The invention discloses a clean glass column circular head grinding device. The device comprises a frame; the frame is correspondingly provided with a fixing module and a grinding module; a driving module for driving the fixing module to perform a reciprocating motion is arranged in the frame; the grinding module includes a groove formed in the frame; a through groove is formed in the center of the groove; a bearing is arranged in the through groove, and is coaxially provided with a vertical rotating shaft; the rotating shaft is coaxially provided with a rotating disc; the rotating disc is arranged at the upper part of a bearing; a fixed disc is arranged at the upper part of the rotating disc; a grinding wheel is horizontally arranged at the top end of the rotating shaft; a first motor is coaxially arranged at the lower part of the rotating shaft; two circles of arc grooves are downwards formed in the bottom of the groove; the arc grooves are arranged at equal intervals; an annular pipe is arranged at the lower parts of the arc grooves in the frame; a collecting box is arranged at the lower part of the annular pipe; a negative-pressure fan is arranged at the bottoms of the arc grooves; and the negative-pressure fan is arranged in the annular pipe. The clean glass column circular head grinding device has such advantages as simple structure, convenience for use and low cost.

The invention discloses an unsymmetrical dimethylhydrazine decontamination apparatus and an unsymmetrical dimethylhydrazine decontamination method. The apparatus comprises a powdery decontaminant storage tank and a decontaminant injection system, the decontaminant injection system is connected with the powdery decontaminant storage tank, the injection system comprises a pneumatic powder conveying device and a gas source device, one end of the pneumatic powder conveying device is connected with the material conveying opening of the powdery decontaminant storage tank, and the other end of the pneumatic powder conveying device is connected with the gas source device through a gas conveying pipeline. The gas source device and the powder conveying pump are used to inject an unsymmetrical dimethylhydrazine decontaminant in order to meet application of the powdery decontaminant and realize soft powder conveying of the pneumatic powder conveying device and increase of the decontamination efficiency; and gas pressure used as a power source is suitable for various working conditions, and overcomes the disadvantages of unable use of a liquid decontaminant in environment with the temperature being less than a freezing point in the prior art, surrounding environment pollution easily caused by pollutant flowing around in the decontamination process, enlarged pollution area, and difficulty in decontamination of charged environment and precious instrument environment.

Underground contamination can be treated with soil amended with oxygen gettering material. The treated soil can act as a reactive medium, creating a favorable environment to remove the contamination, such as breaking down the contamination into less harmful or harmless substances.

The invention discloses an underground water in-situ remediation system based on micro-nano bubbles and a method thereof and relates to the technical field of underground water remediation. The underground water in-situ remediation system comprises air inlet well devices and monitoring well devices, wherein each air inlet well device comprises an air inlet well, an intelligent control box and a nutrient box; each monitoring well device comprises a monitoring well; a micro-nano bubble aeration machine is arranged in the air inlet well; a water inlet and an air inlet are formed in one end of themicro-nano bubble aeration machine; an air outlet is formed in the other end of the micro-nano bubble aeration machine; a water quality monitoring module is arranged in the air inlet well; a plurality of air inlet well devices are respectively arranged at the upstream and the downstream of water flow in a water pollution region; and a plurality of monitoring well devices are arranged in the waterpollution region. The underground water in-situ remediation system disclosed by the invention has the advantages that real-time monitoring on quality of underground water is realized by virtue of theintelligent control box, the water quality monitoring module and a sewage quality monitoring module, specific decomposition treatment on different pollutants is realized, pollutant decomposition efficiency is improved, and specific treatment is carried out, so that influence on the original underground water environment is reduced.

The invention discloses an urban air quality monitoring management and pollution source determination method based on internet of things. The method comprises the following steps: acquiring air quality data collected by multiple air quality monitoring devices; acquiring a geographic positions located by multiple air quality monitoring devices and collection time; importing the geographic positionsand the collection time into a map model, and displaying the air quality data by using different identifiers. The urban city quality is comprehensively monitored through real-time monitoring management, the air quality condition of the corresponding geographic position can be timely acquired, and the acquired air quality data is imported through the map model, thereby directly displaying the distribution conditions of the air quality in various regions, and the person in charge can comprehensively and directly understand the air pollution condition of the region; a pollution source location can be determined according to the detailed data in the polluted region, the air pollution source is key-observed and timely processed, thereby preventing the air pollution source from continuously diffusing to pollute other regions.

The invention discloses an ecological floating bed capable of cleaning floating garbage on a river surface. The ecological floating bed comprises a floating bed carrier, a storage groove is formed inthe side wall of the floating bed carrier, an arc-shaped fishing net is connected into the storage groove in a sliding mode, a storage groove is formed in the inner bottom of the storage groove, a through groove is formed in the side wall of the floating bed carrier, a driving device for driving the arc-shaped fishing net to get in and out of the storage groove is installed in the through groove,a permanent magnet is embedded in the side wall of the arc-shaped fishing net, an iron block is embedded in the inner top of the storage groove, and the arc-shaped fishing net is connected with the driving device through a spring shaft. According to the ecological floating bed capable of cleaning the floating garbage on the river surface, when the arc-shaped fishing net moves back, the arc-shapedfishing net is rotated anticlockwise by 90 degrees through magnetic attraction force, the fished household garbage can fall into the storage groove under the action of gravity, and therefore a traditional ecological floating bed can have the effects of treating the garbage floating on the river surface, preventing pollution diffusion and improving the treatment effect of the ecological floating bed on river pollution.

The invention discloses a small road sweeper. The small road sweeper is characterized in that the sweeper comprises a sweeper body, a sweeping device and a garbage storing device. The sweeping device comprises disc-shaped sweeping heads and a suction unit, and the suction unit comprises an exhaust fan, an air guiding pipe and suction heads, wherein the suction heads are connected with the exhaust fan through the air guiding pipe and comprise the first suction head, the second suction head and the third suction head. Two motors rotating in opposite directions are arranged at the front end of the sweeper body, the disc-shaped sweeping heads are arranged on rotating shafts of the motors, the first suction head is arranged between the two disc-shaped sweeping heads, and the second suction head and the third suction head are arranged on the two sides of the sweeper body correspondingly. The garbage storing device is arranged on the sweeper body and comprises an inner box body and an outer box body. The small road sweeper is high in trafficability, the requirements of cleaning on various road conditions can be met through the sweeping device located on the head and the lateral sides of the sweeper, and meanwhile, the small road sweeper can be converted into a watering cart as required.

The invention relates to a eutectic process for coating tin on a substrate and a chip mounting method thereof. The chip mounting method includes the following process steps: step one, utilizing an existing process to manufacture a metal portion of a lead frame; step two, performing ball bonding area plating on the lead frame manufactured in the step one; step three, coating tin or tin alloy at the chip mounting position of the lead frame which finishes ball bonding area plating in the step two; and step four, performing eutectic chip mounting on the lead frame which finishes coating operation, and enabling the chip mounting position of the frame to be combined together with a back gold chip and a back silver chip. The eutectic process for coating tin on the substrate and the chip mounting method of the eutectic process have no requirements for the chip size. After a layer of tin or tin alloy is coated on the substrate, due to the fact that the thickness of the tin or the tin alloy can be controlled, the thickness of the tin or the tin alloy layer can effectively absorb different stress between the chip and the substrate, and problems of delamination and cracking of a traditional eutectic chip are solved.

The invention discloses a copper-cadmium heavy metal polluted site energy plant ecological intercepting, purifying and repairing system which comprises an isolation wall body arranged on the periphery of a polluted site in a surrounding mode, a plurality of liquid passivator filling modules distributed in the polluted site and energy plants planted on the polluted site. The liquid passivator filling module is used for uniformly adding a liquid passivator into the soil of the polluted site, the energy plants are planted in the soil of the polluted site and are cultivated and managed, and after the energy plants grow to the mature period, the overground parts of the energy plants are harvested or the energy plants are integrally removed from the polluted soil. The invention further discloses a working method of the system. Normal ecological and economic functions of the polluted land are brought into full play, high-valued utilization of the heavy metal polluted land is achieved, energy plants are vigorously developed through the heavy metal polluted land, soil heavy metal pollution can be effectively remedied, the way that heavy metal enters a food chain can be cut off, and food safety is guaranteed.